Electronics Forum | Sun Mar 15 23:58:01 EST 1998 | Phill Hunter
| | I am having a problem with Entek coated boards. The solder past seem to just ball up on the pads. I had no problems with the board when it was hot air leveled. The board is double sided surface mount. I have tried adjusting the oven profiles m
Electronics Forum | Sun Mar 08 10:40:49 EST 1998 | Sam Sangani
We are looking into buying Printed circuit surface mount board assembly bussiness in tri-state(NY,NJ,CT)area. Please contact me via E-mail(pnc@nac.net)- Sam
Electronics Forum | Sun Mar 08 06:07:18 EST 1998 | Rob F
I am looking for information on the electrical performance affects of voltage gradients in PCBs, and links or information on trends in Surface Mount Technology.
Electronics Forum | Sat Sep 01 06:09:25 EDT 2001 | opor_a
Hi guy Please help advise me the impact of using Nitrogen to solder bridging defect. I heard somebody said that using nitrogen can effect the bridging problem by higher surface tension in case inaccurate printing . Is it true? Thanks.
Electronics Forum | Tue Sep 04 11:26:12 EDT 2001 | Jean Michel
During the solderin of a double side board, how can I calculate the maximum weight of a component I can put in the first side to avoid the component fall down in the oven (depending on the soler join surface) ? Are there some rules ?
Electronics Forum | Mon Sep 10 13:54:29 EDT 2001 | zbosskc@netscape.net
We currently use 120 psi top pressure and 110 psi bottom pressure using a Westek Triton DI wash and have had no cleanliness issues with any of our vendors and with surface analysis.
Electronics Forum | Fri Oct 05 09:15:23 EDT 2001 | Ben Bierlein
It is a PCB material that has a woven glass / epoxy internal core and glass veil surface. It is in between the paper materials (FR1,FR2 and CEM1) and FR-4 as far as strength and cost. It is available in HiCTI material for high power applications.
Electronics Forum | Fri Sep 13 10:45:10 EDT 2002 | bcceng
Ken, Try Ray Prasad. Author of the text book Surface Mount Technology: Principles and Practice and numerous papers. www.rayprasad.com
Electronics Forum | Fri Oct 26 07:55:49 EDT 2001 | Kenny
Does anybody know how I work out how heavy a part I can have on the bottom side of the board while reflowing top. Obviously there is a tie between the footprint in the paste and the surface tension of solder paste, but what is it ?
Electronics Forum | Fri Nov 16 10:22:51 EST 2001 | Steve
Try IPC-SM-782A,Surface Mount Design and Land Pattern Standard. Go to http://www.ipc.org
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